Stool



FIG. 1 is a photographic perspective view from the top, front and right side of the present design for a stool;

FIG. 2 is a frontal elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof. 

The ornamental design for a stool, as shown and described. 